curprev16:3316:33, 22 December 2023 Lewisguiletalkcontribs 29,048 bytes+16,971 →Scientific background: I have added significant content and sources, removed a very outdated article (which didn't show what the text seemed to purport) and another which was low quality, and have added more context and info which cross-references other articles on similar topics.undoTags: nowiki addedVisual edit